Okay i rented a swoop to get around Barab quicker, I was doing fine until I pressed on the actual building I wanted to travel to, looking to get off this rock( beside the point) After exiting I couldnt get anywhere the co-ordinates my swoop is on! Its completely gone. I walked for six hours back to the trader only to be told I already had a rented vehicle.......not impressed. Is there some sort recall command/ cancel rent??? any advice would be greatly appreciated.

If you docked the swoop in the building, then you need to go to the building's Hangar room, and you can enter the bike there, then Undock it.
If you just left it outside the building, i can't think of any reason why it would have moved from the square you left it in.
Hope this helps.